Transmitter testing

Single-button fully automated D-PHY testing

TekExpress software ordered with Option D-PHYTX provides an automated, simple, and efficient way to test D-PHY Transmitter interfaces and devices consistent to the requirements of the D-PHY Conformance Test Specification revision up to v1.2.

Automated testing – save time and resources

D-PHYTX allows you to select the desired tests to run and test the multiple lanes that to be tested. The automated solution, allows you to focus on design and debug of the measurements.

Setup test execution and reporting of measurements

Setup and test execution is simple with the TekExpress D-PHYTX software. The oscilloscope is controlled through the TekExpress automation framework. The TekExpress software provides a Graphical User Interface (GUI) and provides an intuitive workflow through setup and testing. D-PHYTX application provides GUI to select Test specification, Tree structure of HS, LP, HS-LP tests as per specifications, and Configuration for test condition.

Setting up the bench

You can view the schematic of the selected test with a push of a button. It also displays graphical representation of the test connection to avoid human errors.

Pass/fail report

The report tab provides a view of test results along with pass or fail status, test margin, and images supporting the test results for each lane of the DUT.

Pass/fail report

Beyond conformance - D-PHY Transmitter testing with D-PHY Essentials

DPOJET software with Option D-PHY provides the essential set of D-PHY Transmitter measurements with greater flexibility in the test setup. This option allows engineers to test device beyond conformance.

The following table outlines the key benefits from the DPOJET Option D-PHY and the TekExpress Option D-PHYTX software solution.

P7700 probe (D-PHY Essentials only) for MIPI D-PHY

MIPI D-PHY application needs special type of probing as it operates in different impedance mode in High Speed and Low Power mode. In High Speed mode, D-PHY signals operate in terminated mode with differential signaling. In Low Power mode, D-PHY signal is operated in unterminated mode with single-ended signals. MIPI D-PHY has two main requirements for probing:

Provide high impedance

Differential and single-ended mode

P7700 Series probe (D-PHY Essentials only) provides active buffer tip designed for Low Probe loading few millimeters from end of tip to provide best signal fidelity for MIPI D-PHY application along with flexible connectivity options.

With TriMode probing, probe setup makes differential, single-ended, and common mode measurements accurately. This unique capability allows you to work more effectively and efficiently, switching between differential, single-ended and common mode measurements without moving the probe's connection points.

You can be confident in the signal fidelity of your measurements. The innovative new probe design uses SiGe Technology to provide the bandwidth and fidelity needed today and in the future.

The P7700 Series probe (D-PHY Essentials only) architecture provides:

An active buffer amplifier on the tips with the probe input only 3.2 mm from the input

The D-PHYXpress supports waveform generation for High Speed, Low Power, and Low Power-High Speed (LP-HS) mode as per D-PHY specification up to v2.0.

High Speed mode: The D-PHY v2.0 specification data rate is up to 4.5 Gbps in High Speed mode. As per CTS, you need to emulate the channel effect in High Speed mode. D-PHYXpress application allows you to edit the data rate, rise time, pattern type, voltage level, and impairments to emulate the channel effect.

Low Power mode: The D-PHY v2.0 specification data rate is up to 100 MHz in Low Power mode. The D-PHYXpress application allows you to edit data rate, rise time, pattern type, voltage level, and impairments to emulate the channel effect.

LP-HS mode: The D-PHYXpress allows you to add Sync Word as per the specification with timing parameters for Data and Clock.

LP-HS mode

Step 2: Calibrate the signal as per CTS requirement

Calibration of signal impairments provides calibration routines that are D-PHY standard specific. The objective of calibration is to compensate the patterns for specific jitter parameters. The typical parameters are Random, Periodic Jitter, and Amplitude. The procedure sequences through all the patterns and each pattern is calibrated independently. These values are used for the Jitter controlled generation of patterns and are injected into the DUT during loopback.

Test coverage

For more details, refer to theReceiver test specificationtable.

Batch mode

Batch mode allows you to create a library of compiled waveforms with incremental Jitter value with a single click.

High Speed Batch mode

Scope-based decode for DSI-1 and CSI-2

The SR-DPHY application option enables decoding of DSI-1 and CSI-2 buses. SR-DPHY displays all the decoded components of short packets, long packets, and other communications types such as Bus Turn Around (BTA) and Escape Mode commands. In addition, DCS packets decode the DCS command.

Ordering Information

D-PHYTX Automated

Model

Description

DPO7254/C DPO7354/C MSO70000/C DPO70000B/C/DX/SX

DPO (Digital Phosphor Oscilloscope), MSO (Mixed Signal Oscilloscope) Oscilloscopes - 3.5 GHz and above is recommended Where rise time accuracies are not a concern, a 2.5 GHz oscilloscope can also be used.

D-PHY Essentials

Model

Description

DPO7254/C DPO7354/C MSO70000/C DPO70000B/C/DX/SX

DPO (Digital Phosphor Oscilloscope), MSO (Mixed Signal Oscilloscope) Oscilloscopes - 3.5 GHz and above is recommended. Where rise time accuracies are not a concern, a 2.5 GHz oscilloscope can also be used.